/* ==========================================
   QOSMOS PAY - Premium Fintech Styling
   ========================================== */

/* CSS Variables */
:root {
    /* Primary Colors */
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    
    /* Accent Colors */
    --accent: #10b981;
    --accent-light: #34d399;
    --accent-warning: #f59e0b;
    
    /* Background Colors - Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    
    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    /* Border Colors */
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-accent: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-dark: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    --gradient-glow: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
    
    /* Spacing */
    --section-padding: 120px 0;
    --container-width: 1200px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    line-height: 1.2;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p { color: var(--text-secondary); }

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

/* ==========================================
   NAVIGATION
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 56px;
    width: auto;
}

.logo-text {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-tertiary);
    padding: 8px 16px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.lang-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.lang-btn:hover {
    color: var(--text-primary);
}

.lang-btn.active {
    color: var(--text-primary);
    background: var(--bg-card);
}

.lang-divider {
    color: var(--border-hover);
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-normal);
}

.btn-primary {
    background: var(--gradient-primary);
    color: #ffffff;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: rgba(99, 102, 241, 0.1);
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 140px 0 100px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: var(--gradient-dark);
}

.hero-particles {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(3px 3px at 20px 30px, rgba(99, 102, 241, 0.5), transparent),
        radial-gradient(3px 3px at 40px 70px, rgba(139, 92, 246, 0.45), transparent),
        radial-gradient(3px 3px at 50px 160px, rgba(16, 185, 129, 0.45), transparent),
        radial-gradient(3px 3px at 90px 40px, rgba(99, 102, 241, 0.5), transparent),
        radial-gradient(3px 3px at 130px 80px, rgba(139, 92, 246, 0.45), transparent),
        radial-gradient(3px 3px at 160px 120px, rgba(16, 185, 129, 0.45), transparent);
    background-size: 200px 200px;
    animation: particles 20s linear infinite;
}

@keyframes particles {
    from { transform: translateY(0); }
    to { transform: translateY(-200px); }
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-glow);
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #1e1b4b 0%, #4338ca 50%, #6366f1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease forwards;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s forwards;
    opacity: 0;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================
   SECTION HEADERS
   ========================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    background: linear-gradient(135deg, #1e1b4b 0%, #4338ca 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Particles Background */
.section-particles {
    position: relative;
}

.section-particles::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, rgba(99, 102, 241, 0.3), transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(139, 92, 246, 0.25), transparent),
        radial-gradient(2px 2px at 50px 160px, rgba(16, 185, 129, 0.25), transparent),
        radial-gradient(2px 2px at 90px 40px, rgba(99, 102, 241, 0.3), transparent),
        radial-gradient(2px 2px at 130px 80px, rgba(139, 92, 246, 0.25), transparent),
        radial-gradient(2px 2px at 160px 120px, rgba(16, 185, 129, 0.25), transparent);
    background-size: 200px 200px;
    animation: particles 25s linear infinite;
    pointer-events: none;
    z-index: 0;
}

/* ==========================================
   PROBLEM SECTION
   ========================================== */
.problem {
    padding: var(--section-padding);
    background: var(--bg-secondary);
    position: relative;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.problem-card {
    background: var(--bg-card);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.problem-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.problem-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    font-size: 1.5rem;
    color: white;
}

.problem-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.problem-card p {
    font-size: 1rem;
    line-height: 1.7;
}

/* ==========================================
   CAPABILITIES SECTION
   ========================================== */
.capabilities {
    padding: var(--section-padding);
    background: var(--bg-primary);
    position: relative;
}

.capabilities-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-normal);
}

.tab-btn:hover {
    border-color: var(--primary);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--text-primary);
}

.capability-panel {
    display: none;
    animation: fadeInUp 0.5s ease forwards;
}

.capability-panel.active {
    display: block;
}

.capability-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.capability-item {
    background: var(--bg-card);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.capability-item:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.capability-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-accent);
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    font-size: 1.25rem;
    color: white;
}

.capability-item h4 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.capability-item p {
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ==========================================
   PRINCIPLES SECTION
   ========================================== */
.principles {
    padding: var(--section-padding);
    background: var(--bg-secondary);
    position: relative;
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.principle-card {
    background: var(--bg-card);
    padding: 48px 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
}

.principle-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 1;
}

.principle-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.principle-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary);
    opacity: 0.2;
    position: absolute;
    top: 16px;
    right: 24px;
    line-height: 1;
}

.principle-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.principle-card p {
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ==========================================
   VISION SECTION
   ========================================== */
.vision {
    padding: var(--section-padding);
    background: var(--bg-primary);
    position: relative;
}

.vision-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.vision h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 24px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.vision > .container > .vision-content > .vision-text > p {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 60px;
}

@media (max-width: 768px) {
    .vision > .container > .vision-content > .vision-text > p {
        white-space: normal;
    }
}

.community-section h3 {
    font-size: 1.5rem;
    margin-bottom: 32px;
    color: var(--text-primary);
}

.community-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.community-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-weight: 500;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.community-link:hover {
    border-color: var(--primary);
    color: var(--text-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.community-link svg {
    fill: currentColor;
}
}

.community-link i {
    font-size: 1.25rem;
    color: var(--primary);
}

/* ==========================================
   JOIN US SECTION
   ========================================== */
.join-us {
    padding: 100px 0;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.join-us::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
}

.join-us-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.join-us h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 16px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.join-us-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.join-form {
    display: flex;
    gap: 12px;
    max-width: 500px;
    margin: 0 auto;
    flex-wrap: wrap;
    justify-content: center;
}

.join-form input[type="email"] {
    flex: 1;
    min-width: 250px;
    padding: 16px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.join-form input[type="email"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.join-form input[type="email"]::placeholder {
    color: var(--text-muted);
}

.join-form .btn {
    white-space: nowrap;
}

.form-message {
    margin-top: 20px;
    font-size: 0.95rem;
    min-height: 24px;
}

.form-message.success {
    color: var(--accent);
}

.form-message.error {
    color: #ef4444;
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    padding: 60px 0 30px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
}

.footer-links {
    display: flex;
    justify-content: center;
}

.footer-link {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: var(--primary);
}

.footer-link i {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 768px) {
    .hero {
        padding: 120px 0 80px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-title br,
    .vision-text p br {
        display: inline;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .problem-card,
    .capability-item,
    .principle-card {
        padding: 32px;
    }
    
    .capabilities-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .community-links {
        flex-direction: column;
        align-items: center;
    }
    
    .community-link {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .lang-toggle {
        padding: 6px 12px;
    }
    
    .problem-grid,
    .capability-grid,
    .principles-grid {
        grid-template-columns: 1fr;
    }
    
    .join-form {
        flex-direction: column;
    }
    
    .join-form input[type="email"],
    .join-form .btn {
        width: 100%;
        max-width: none;
    }
    
    .vision-text p {
        white-space: normal;
    }
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* Smooth scroll offset for fixed header */
section[id] {
    scroll-margin-top: 80px;
}